/Engine/Source/Runtime/Experimental/FieldSystem/Source/FieldSystemEngine/Public/Field/FieldSystemComponent.h
FalloffRadialForce This function will dispatch a command to the physics thread to apply a linear force from a position in space. The force vector is weaker as it moves away from the center.
void ApplyRadialVectorFalloffForce ( bool Enabled, FVector Position, float Radius, float Magnitude )